Edward wilson



No. 6l3,544.

(No Model.)

Patented Nov. I, I898.

E. WILSON.

MEANS FORCONTR'OLLING DRAFT 0F FURNACES.

(Application filed Dec. 28, 1897.)

ms uoams PEYERs 00., PHOTD-LITHQ, WASHINGTON. n c.

NITED STATES PATENT OFFIcE.

EDWARD WILSON, OF EXETER, ENGLAND.

MEANS FOR CONTROLLING DRAFT OF FURNACES.

$PECIFICATION forming part of Letters Patent No. 613,544, dated. November 1, 1898.

Application filed December 28, 1897- Serial No. 663,986- (N'o model.)

To all whom it may concern.-

Be it known that I, EDWARD WILSON, a subject of the Queen of Great Britain, residing at Exeter, in the county of Devon, England, have invented Improved Means for Controlling the Draft of Furnaces, of which the following is a specification.

The present invention relates to improved means for controlling the draft to any kind of furnace; and it consists in the employment of one or more bars of special construction, which may either be substituted for the ordinary fire-bars or may in some cases be used in combination with such bars and when two or more sections of fire-bars are employed may be applied to all or any one of such sections.

The improved bars may be employed for producing a forced draft through same by means of a steam-jet, in which case a closed ash pit and an independent steam jet or blower are preferably used.

The main objects of the invention are, first, to regulate the space through which the air passes into the fire, so that the force of such air may be controlled to the best advantage, or, in other words, to vary the volume of air entering, while increasing or diminishing its intensity; secondly, to so direct the draft that same will pass, preferably, in a horizontal direction through the fire instead of vertically up through same; thirdly, to provide means for keeping the air-orifices clear from dust and clinker, and, fourthly, to provide a space for the reception of slag or dust below the air-orifices.

My invention is illustrated in the accompanying drawings, in which Figure 1 is a vertical section of part of a furnace provided with bars constructed and arranged in accordance with my invention, and Fig. 2 is a similar view showing a modified form of such bars.

In carrying out this invention according to the arrangement shown in Fig. 1 I employ.

bars A having central slots B, such slots being provided with flanges G on each side. The bars A are so arranged in the furnace that the slots are in communication with the blast-supply D and so that the blast can pass through same into the fuel, which is arranged on the bars and over and around the flanges C.

To carry out one of the main objects of my invention, I arrange in each of the slots B a T or Y shaped bar E, which is so formed and situated that its upper part will entirely cover the top of the slot B, but leavinga space 0 at each side, thereby causing the blast to issue from the slot through the space 0, and consequently in a horizontal or substantially horizontal direction. The T or Y bars E are preferably provided at suitable intervals with webs or flanges e, which keep them in the center of the slots B in the bars A. I further employ means for enabling the T or Y bars E to be raised or lowered, so as to control the space 0 left between the lower surface of the heads of same and the top of the flanges O and thereby the amount or force of air admitted to the fuel. For this purpose cams F, mounted on a spindle G (or cast in one piece therewith) and actuated from the outside of the furnace, may be arranged so as to act on the lower edges of the T or Y bars and raise or lower same at will. In the drawings I have shown the spindle G, carrying the cams F, as being actuated by means of an arm I,mounted on the spindle, a rod J connecting such arm I with alever K, (shown in broken lines in Fig. 1,) pivoted outside the furnace, so that on such lever K being operated in one or the other direction the T or Y bars E will be raised or lowered, as desired.

The bars E are arranged loosely in the slots B, so that they can be taken out and renewed, if necessary.

It will be readily understood that instead of the bars A being of the form above dey scribed they may be of channel section, having flanges B at each side, and in this case they will be arranged at suitable distances ordinary blast is shut off. lVith this object the space L in the interior of the bars E is in this arrangement placed in constant communication with a small jet of steam while the furnace is in operation, this having the effect of creating a draft inside the bars E and which will keep them cool and prevent any distortion or damage to the apparatus.

The upper surfaces of the adjacent bars A on each side of the flanges C and below the air-orifices 0 may form the space for clinker, 8:0. The upper edges of the flanges O are also preferably beveled off, as shown, this, assisted by the action of the blast itself, tending to keep the air-orifices 0 clear and free from dust and clinker.

It will be understood that instead of either of the arrangements above described tubular bars may be employed, the upper part of each of which is provided with a central longitudinal slot, in which a T or Y bar is arranged as described, the upper arms of which are so situated in relation to the slot that the blast will issue from the opening left between the edges in a horizontal or approximately horizontal direction. If this arrangement is employed the interior of the tubular bars will be placed in communication with the blast, (any suitable apparatus for producing which may be employed.)

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In a grate, the combination of bars having central slots therein, flanges disposed on each side of said slots, a blast-supply connected with said slots, and adjustable means disposed in said slots for regulating the supply of air to the fuel.

2. In a grate, the combination of bars having slots therein, flanges disposed on each side of said slots, bars disposed in said slots and provided with heads adapted to cover the tops of said slots, means for guiding said bars and keeping them in the center of said slots, and means for raising and lowering said bars thereby controlling the space between the heads of the bars and the top of the flanges.

3. In a grate the combination of bars having slots therein, flanges disposed on each side of said slots, bars disposed in said slots and provided with heads adapted to extend over and cover the tops of said slots, mechanism for raising and lowering said bars, and an air-blast mechanism connected with said grate-bars and in communication with said slots.

4. In a grate, the combination of grate-bars having slots therein, flanges disposed on each side of said slots, bars disposed in said slots and provided with heads adapted to cover the tops of said slots, a spindle disposed beloW said grate-bars and extending across the slots therein, said spindle being connected with the bars in the slots, and means for turning said spindle for raising or lowering the headed bars disposed in the slots.

5. In a grate, the combination of grate-bars having slots therein, flanges disposed on each side of said slots, bars disposed in said slots and provided with heads adapted to extend over and cover the tops of said slots, a spindle disposed below said grate-bars and extending across the slots therein, cams on said spindle, said cams being connected to said headed bars, and means for turning said spindle and cams thereby regulating the space between the headed bars and the flanges.

6. In a grate, the combination of grate-bars having slots therein, flanges disposed on each side of said slots and forming chambers for the clinkers, hollow-headed bars disposed in said slots, mechanism for raising and lowering said bars, and means for supplying air or steam to said hollow heads.

EDWD. \VILSON.

lVitnesses:

FRANK Mansn, R. FLEMING. 

